Retaining wall



FIG. 1 is a left front perspective view of a wall showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is the opposite side of the retaining wall shown in FIG. 4;

FIG. 6 is the opposite side of the retaining wall shown in FIG. 3; and,

FIG. 7 is a cross sectional view taken along line 7--7 of FIG. 3.

The ornamental design of a retaining wall, as shown and described.